Though their divorce was finalized back in 2009, the bitterness between Kate and Jon Gosselin lingers on — most recently evident in their tit-for-tat media battles and Jon’s threat to sue for custody of their 9-year-old sextuplets. But do you know the original cause for their split? This week on Couples Therapy, Jon reveals that, contrary to public belief, it was not infidelity (on his part) that drove these two apart. Jon and his girlfriend Liz Jannetta are currently starring on the VH1...